package day04.ext;

public class Demo03 {
    public static void main(String[] args) {
        String s = "8";
        StringBuilder ss = new StringBuilder("8");
        test(s, ss);
        System.out.println(s + " " + ss);
    }
    public static void test(
            String s, StringBuilder ss){
        s+="8";
        ss.append("8");
    }
}
